Fixed. We needed to change computeCDT, which before returned 0 if any test set included only cases with same true labels (or included only one example, as with leave-one-out). New orngStat.py and corn.pyd are already on CVS, the two files should be in the distribution snapshot after midnight. Check also http://www.ailab.si/orange/doc/modules/orngStat.htm for new description of computeCDT.

John, if you're not in too much hurry it might be better if you wait for a few more days - we're just adding some new functionality to Orange which can make the snapshots rather unstable. We'll sure anounce it when it's done.